[Bug 204849] amdgpu (RX560X) traceboot in dmesg boot output, system instability

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=204849

--- Comment #2 from Robert Hoffmann (robert at servermasters.com) ---
(In reply to Robert Hoffmann from comment #1)
> Hi guys,
> 
> I am getting a very similar issue with a Ryzen 3400G  (AMDGPU).
> 
> OS Fedora 31: Linux asrock 5.3.16-300.fc31.x86_64 #1 SMP Fri Dec 13 17:59:04
> UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
> 
> The problem manifests itself every time I enter into an Xorg (LXDE) session,
> I guess one time per CPU core. So I am getting 10-12 errors every time I log
> in, as popups.  Xfce also will not work at all, only LXDE (Openbox) seems to
> work fine.
> 
> Operationally all seems relatively OK though, except if I turn off one of my
> 2 monitors, and turn them back on, I will get the errors again.
> 
> 
> I dont have a kernel debugger or profiler installed.
> 
> -------- here is a snippet of a backtrace: -------------
> WARNING: CPU: 1 PID: 917 at
> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:1758
> write_i2c_retimer_setting.cold+0xae/0xb5 [amdgpu]
> Modules linked in: serpent_avx2 serpent_avx_x86_64 serpent_sse2_x86_64
> serpent_generic dm_crypt xt_CHECKSUM xt_MASQUERADE nf_nat_tftp
> nf_conntrack_tftp xt_CT tun bridge stp llc ip6t_REJECT nf_reject_ipv6
> ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat
> ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security
> iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack
> nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c ip_set nfnetlink ebtable_filter
> ebtables ip6table_filter ip6_tables iptable_filter sunrpc
> snd_hda_codec_realtek snd_hda_codec_generic edac_mce_amd ledtrig_audio
> snd_hda_codec_hdmi kvm_amd ccp snd_hda_intel snd_hda_codec kvm snd_hda_core
> snd_hwdep irqbypass snd_seq crct10dif_pclmul snd_seq_device crc32_pclmul
> snd_pcm joydev wmi_bmof ghash_clmulni_intel snd_timer nvme sp5100_tco
> nvme_core snd k10temp i2c_piix4 soundcore acpi_cpufreq ip_tables uas
> usb_storage amdgpu amd_iommu_v2 gpu_sched i2c_algo_bit ttm drm_kms_helper drm
>  crc32c_intel r8169 wmi video pinctrl_amd fuse
> CPU: 1 PID: 917 Comm: Xorg Tainted: G        W        
> 5.3.16-300.fc31.x86_64 #1
> Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./A300M-STX, BIOS
> P3.50 05/15/2019
> RIP: 0010:write_i2c_retimer_setting.cold+0xae/0xb5 [amdgpu]
> Code: 6c f4 a0 c1 0f 0b e9 0e 0d fd ff 48 c7 c7 80 ee 7f c0 e8 59 f4 a0 c1
> 0f 0b e9 27 0b fd ff 48 c7 c7 80 ee 7f c0 e8 46 f4 a0 c1 <0f> 0b e9 fd 09 fd
> ff 48 c7 c7 80 ee 7f c0 e8 33 f4 a0 c1 0f 0b e9
> RSP: 0018:ffffbe23c190f6a0 EFLAGS: 00010246
> RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffff99fc50657908 RDI: ffff99fc50657908
> RBP: ffffbe23c190f71c R08: ffff99fc50657908 R09: 000000000000072a
> R10: 0000000000024924 R11: 0000000000000003 R12: 000000000000005d
> R13: 0000000000000000 R14: ffff99fc18140648 R15: 0000000000000000
> FS:  00007fd0f4484f00(0000) GS:ffff99fc50640000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000055800df036e8 CR3: 00000003ef71a000 CR4: 00000000003406e0
> Call Trace:
> --------------------------

Quick update:  there is also a bug in Redhat bugzilla, which is directly
repated:
Bug link: https://bugzilla.redhat.com/show_bug.cgi?id=1786489

BTW, this happens both on the Display Port and the HDMI port.

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